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mart [117]
3 years ago
11

Two times the sum of a number and 5 is 20

Mathematics
2 answers:
Art [367]3 years ago
6 0

Answer:

25

Step-by-step explanation:

Zolol [24]3 years ago
4 0

Answer:

Let the required number be ' x '

According to the given problem

  • Equation :--- <u>2(x + 5) = 20</u>

Now, by solving for x, we get

2(x + 5) = 20 \\ (x + 5) =  \frac{20}{2}  \\ (x + 5) = 10 \\ x = 10 - 5 \\ \boxed{ x = 5}

  • <u>2(x + 5) = 20</u> is the required equation
  • <u>x</u><u> </u><u>=</u><u> </u><u>5</u> is the required value of x

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How to solve these two problems ?
puteri [66]

8)  \theta is -0.896 radians

9) length of arc is 41.91 cm

Solution:

8)

Given that,

tan\ \theta = \frac{-5}{4}

\theta is in quadrant 4

To find: \theta

From given,

tan\ \theta = \frac{-5}{4}\\\\\theta = tan^{-1} \frac{-5}{4}\\\\\theta = tan^{-1} (-1.25)\\\\\theta = -51.34

Thus value of \theta is -51.34 degrees

Convert degrees to radians

-51.34\ degree = -51.34 \times \frac{ \pi }{180}\ radian\\\\-51.34\ degree = -0.896\ radian

Thus \theta is -0.896 radians

9)

From given,

radius = 15.4 cm

\theta = \frac{13 \pi }{15}

<em><u>The length of arc when angle in radians is:</u></em>

arc\ length = r \times \theta\\\\arc\ length = 15.4 \times \frac{ 13 \pi }{15}\\\\arc\ length = 15.4 \times 2.721\\\\arc\ length = 41.91

Thus length of arc is 41.91 cm

4 0
3 years ago
A professor wants to award prizes for 1st, 2nd, 3rd, 4th and 5th in the class of 30. In how many ways can the prizes be awarded
aniked [119]

Answer:

Selection =  17100720\ ways

Step-by-step explanation:

Given

Students = 30

Positions = 5 i.e. first to fifth

Required

Determine number of selection

1st position = Any of the 30 students

2nd position = Any of the 29 students

3rd position = Any of the 28 students

4th position = Any of the 27 students

5th position = Any of the 26 students

Number of selection is then calculated as:

Selection =  30 * 29 * 28 * 27 * 26

Selection =  17100720\ ways

8 0
3 years ago
If two angles of one triangle are congruent to two angles of another triangle, then the _____ are congruent.
Paraphin [41]

Answer:

TRIANGLES

Step-by-step explanation:

3 0
3 years ago
13 plus 5 times a number is no more than 30
omeli [17]
From what I'm reading from this question, there's one answer.

13 + 5 * 1 = 18 

Unless maybe I'm missing something?
5 0
4 years ago
Help plz... Davidmedulla... I mean you in particular
kap26 [50]

Answer:

1. 2x

2. 22

Step-by-step explanation:

question 1

f(x)-g(x)

5x-3-(3x-3)

5x-3-3x+3

5x-3x-3+3

2x+0

2x

question 2

f(x)=y

f(-4)= -5(-4)+ (-4/-2)

= 20 + 2

=22

5 0
3 years ago
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